tofsee | 1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e

General

Target

1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe
Size

99KB
MD5

1fd5cc1d4e9cd89756af71a2c633d7e1
SHA1

b3575cedf98cad9a62691531fa7136acd70c160e
SHA256

1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e
SHA512

b639c81f4b4c8cb035b35bfbbb7a830046e8a2734653d25aaf90997a2e3b84b049ace52cf153a462deb8ac7bad4c3fb9455ec0c69304bae18620a1c969d85c61

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee

Windows security bypass 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\sjtqkrci = "0"	svchost.exe

Creates new service(s) 1 TTPs
persistence

New Service
T1050
Executes dropped EXE 1 IoCs

Processes:

dunqxkwv.exe

pid process

520 dunqxkwv.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1324 netsh.exe

pid	process
520	dunqxkwv.exe

pid	process
1324	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\sjtqkrci\ImagePath = "C:\\Windows\\SysWOW64\\sjtqkrci\\dunqxkwv.exe"	svchost.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

1212 svchost.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

dunqxkwv.exe

description pid process target process

PID 520 set thread context of 1212 520 dunqxkwv.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

1996 sc.exe
1960 sc.exe
1704 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

pid	process
1212	svchost.exe

description	pid	process	target process
PID 520 set thread context of 1212	520	dunqxkwv.exe	svchost.exe

pid	process
1996	sc.exe
1960	sc.exe
1704	sc.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exedunqxkwv.exe

description	pid	process	target process
PID 756 wrote to memory of 2008	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 2008	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 2008	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 2008	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 1172	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 1172	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 1172	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 1172	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	cmd.exe
PID 756 wrote to memory of 1996	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1996	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1996	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1996	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1960	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1960	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1960	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1960	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1704	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1704	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1704	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 756 wrote to memory of 1704	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	sc.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 520 wrote to memory of 1212	520	dunqxkwv.exe	svchost.exe
PID 756 wrote to memory of 1324	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	netsh.exe
PID 756 wrote to memory of 1324	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	netsh.exe
PID 756 wrote to memory of 1324	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	netsh.exe
PID 756 wrote to memory of 1324	756	1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe
"C:\Users\Admin\AppData\Local\Temp\1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sjtqkrci\
2⤵
PID:2008

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dunqxkwv.exe" C:\Windows\SysWOW64\sjtqkrci\
2⤵
PID:1172

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create sjtqkrci binPath= "C:\Windows\SysWOW64\sjtqkrci\dunqxkwv.exe /d\"C:\Users\Admin\AppData\Local\Temp\1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:1996

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description sjtqkrci "wifi internet conection"
2⤵
- Launches sc.exe
PID:1960

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start sjtqkrci
2⤵
- Launches sc.exe
PID:1704

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
2⤵
- Modifies Windows Firewall
PID:1324

C:\Windows\SysWOW64\sjtqkrci\dunqxkwv.exe
C:\Windows\SysWOW64\sjtqkrci\dunqxkwv.exe /d"C:\Users\Admin\AppData\Local\Temp\1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:520

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
PID:1212

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

New Service

1

T1050

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

New Service

1

T1050

Defense Evasion

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\dunqxkwv.exe
Filesize
11.1MB

MD5
69a185c4517ec31b73bb450812651e87

SHA1
86d6ea05b326b8e071aaac4c7ad9c3d25828f4fb

SHA256
3ef243009f69726783511b5c7f498872d2ab5113abae5b8b292dcbe5a6d61a85

SHA512
d6bdcd5eb73f000106ce0fb75ea35dc81d3dc1347fa70b200a73eda4b585b7e0b78ee15aacf93007d96879fb39c68fbde611357b99f2c4ce575d0c32ac96384e

Download Submit
C:\Windows\SysWOW64\sjtqkrci\dunqxkwv.exe
Filesize
11.1MB

MD5
69a185c4517ec31b73bb450812651e87

SHA1
86d6ea05b326b8e071aaac4c7ad9c3d25828f4fb

SHA256
3ef243009f69726783511b5c7f498872d2ab5113abae5b8b292dcbe5a6d61a85

SHA512
d6bdcd5eb73f000106ce0fb75ea35dc81d3dc1347fa70b200a73eda4b585b7e0b78ee15aacf93007d96879fb39c68fbde611357b99f2c4ce575d0c32ac96384e

Download Submit
memory/520-65-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/520-64-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/756-55-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/756-56-0x00000000763E1000-0x00000000763E3000-memory.dmp

Filesize
8KB

Download
memory/756-54-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/1172-58-0x0000000000000000-mapping.dmp

Download
memory/1212-67-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1212-69-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1212-70-0x0000000000089A6B-mapping.dmp

Download
memory/1212-76-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1212-77-0x0000000000080000-0x0000000000095000-memory.dmp

Filesize
84KB

Download
memory/1324-74-0x0000000000000000-mapping.dmp

Download
memory/1704-62-0x0000000000000000-mapping.dmp

Download
memory/1960-61-0x0000000000000000-mapping.dmp

Download
memory/1996-60-0x0000000000000000-mapping.dmp

Download
memory/2008-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads